She's left fans green with envy thanks to her incredible post-pregnancy weight loss.

But it seems that Kim Kardashian's rush to regain her svelte frame has had an unwanted effect on her hair.

Images of the 33-year-old with her hair tied up in a high bun while out in Los Angeles last week show the extent of what appears to be extreme hair loss, which the reality star seems to have been attempting to cover up with weaves and hair extensions.

And according to hair extension expert Tatiana Karelina, it could be Kim's rapid weight loss that triggered her hair loss.

Tatiana
told MailOnline: 'It is well known that during the later stage of
pregnancy you lose less hair due to hormones, making it thicker and
lusher, but when you have the baby most women find they seem to be
losing a lot more hair than normal.

'What with the rapid amount of weight Kim lost and dieting in the
months after the birth, this may have accelerated the hair loss, giving
sparser looking patches, we can clearly see how thin her hair is around
the hairline.

Where the real ends and the fake begins: The line of Kim's extensions could clearly be seen

During pregnancy: Kim showed no signs of any hair loss as she was pictured with her hair scraped back into a ponytail back last May

'Birth
and rapid weightloss are both factors that have triggered her thinning
hair and made her opt for hair extensions to boost her diminished hair
volume.'

Tatiana added that Kim's apparent reliance on hair extensions to give her boosted locks have now left her withTraction
Alopecia, and that she should have the weaves removed as soon as
possible if she doesn't want to damage her hair further.

She
told MailOnline: 'In spite of giving instant full thick hair, weaves
put extreme pressure on the hair and scalp, often too heavy and tight,
the pulling and weight often cause severe migraines and Traction
Alopecia, and actually aid hair loss rather than help to recover healthy
hair regrowth.

Top knot trouble: Kim displayed the hair loss as she wore her hair up in a high bun while out in Los Angeles last week

'I would not
recommend that Kim keep the weave in her hair, but rather opt for
lighter non damaging types of extensions, or a simple clip-in that can
be taken out often to relieve pressure on hair follicles and the scalp.'

Kim isn't the only star to have suffered after relying on extensions and weaves.

Rihanna
and Naomi Campbell are among the other famous faces to have found
themselves with damaged hair after boosting their barnets with
extensions.

A spokesperson for Kim denied the reality star wears extensions.

Better when it's down: When Kim's hair is left loose, the damage can hardly be seen

Glossy locks: Kim showed off her healthier looking hair as she stepped out in Beverly Hills on Monday